• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>First ICFA(International Committee for Future Accelerators) Instrumentation School; Nov 18-29, 2002; Morelia, Michoacan, Mexico >Transfer and Breakup Modes of the Borromean ~6He Nucleus in ~(209)Bi near the Coulomb Barrier
【24h】

Transfer and Breakup Modes of the Borromean ~6He Nucleus in ~(209)Bi near the Coulomb Barrier

机译：库仑壁垒附近〜（209）Bi中的硼铁烷〜6He核的转移和分裂模式

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In recent experiments, we have for the first time measured near-barrier and sub-barrier transfer and/or breakup yields for an exotic Borromean nucleus ~6He, on a ~(209)Bi target. An isolated ~4He group was observed at an effective Q-value of approximately -2.5 MeV whose integrated cross section was exceptionally large, greatly exceeding the fusion yield both above and below the barrier. Simultaneously measured elastic-scattering angular distributions required total reaction cross sections that confirmed this large yield. Preliminary coupled-channels calculations suggested that the reaction mechanism can best be described by direct breakup and neutron transfer to unbound states in ~(211)Bi. The calculations also predicted an enhancement in the sub-barrier fusion yield due to coupling to the transfer and/or breakup channel, which strongly suggested that this is the doorway state that accounts for the remarkable suppression of the fusion barrier that was observed in a previous experiment.
机译：在最近的实验中，我们首次测量了〜（209）Bi靶上外来的Borromean核〜6He的近势垒和亚势垒转移和/或分解产率。观察到一个孤立的〜4He组，其有效Q值约为-2.5 MeV，其综合截面非常大，大大超过了势垒以上和以下的融合产率。同时测量的弹性散射角分布需要总的反应横截面，这证实了这种大产率。初步的耦合通道计算表明，反应机理可以通过直接分解和中子转移到〜（211）Bi中的未结合态来最好地描述。这些计算还预测了由于与转移和/或分解通道的耦合，亚壁垒融合产率的提高，这强烈表明，这是门路状态，这是对先前观察到的对融合壁垒的显着抑制的原因。实验。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号